Smoking during pregnancy

unfortunately I smoked earlier in my pregnancy....i have maybe month to go now. But I did smoke start off by smoking 1/4 a pk and went down to .5 single cig a day. I was a smoker for 7 years. And I quit permanently w/o gum, patches, or even counseling...thank Jesus. But even tho I stopped and I get nst 2x a wk and ive had plenty ultrasounds n my bby is 100% fine to 5 diff doctors...i need to knw is my bby damaged n any way. If so how